(2'S,4'R,6'S)-4'-hydroxy-2'-(hydroxymethyl)-2',4',6'-trimethyl-1',2',3',4'-tetrahydrospiro[cyclopropane-1,5'-inden]-7'(6'H)-one Illudin I InChI=1/C15H22O3/c1-9-12(17)10-6-13(2,8-16)7-11(10)14(3,18)15(9)4-5-15/h9,16,18H,4-8H2,1-3H3/t9-,13-,14+/m1/s spiro[cyclopropane-1,5'-[5H]inden]-7'(6'H)-one, 1',2',3',4'-tetrahydro-4'-hydroxy-2'-(hydroxymethyl)-2',4',6'-trimethyl-, (2'S,4'R,6'S)-